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[Broken External Image]:http://ecn.channel9.msdn.com/o9/ch9/2/1/2/4/0/5/C9LecturesMeijerFPC9_85_ch9.pngWeve kicked off C9 Lectures with a journey into the world of Functional Programming with functional language purist and high priest of the lambda calculus, Dr. Erik Meijer (you can thank Erik for many of the functional constructs that have shown up in languages like C# and VB.NET. When you use LINQ, thank Erik in addition to Anders).
We will release a new chapter in this series every Thursday.
In Chapter 9, Interactive Programs, Dr. Meijer will teach us how to make programs in Haskell that are side-effecting: interactive. Haskell programs are pure mathematical functions with no side effects. That said, you want to be able to write Haskell programs that can read input from the keyboard and write output to the screen which are in fact side effects. So, interactive programs have side effects... Interactive programs can be written in Haskell by using types to distinguish pure expressions from impure actions that may involve side effects.
Consider the following:
IO a
The type of actions that return values of type a
IO Char
The type of actions that return a character
IO()
The type of purely side effecting actions that return no result value
Warning: This lecture may contain the use of the term Monad. Do not fear. Everything will be OK.
You should watch these in sequence (or skip around depending on your curent level of knowledge in this domain):
Get the presentation slides here
Chapter 1
Chapter 2
Chapter 3
Chapter 4
Chapter 5
Chapter 6
Chapter 7
Chapter 8[Broken External Image]:http://channel9.msdn.com/504212/WebViewBug.aspx?EVT=0
More...
We will release a new chapter in this series every Thursday.
In Chapter 9, Interactive Programs, Dr. Meijer will teach us how to make programs in Haskell that are side-effecting: interactive. Haskell programs are pure mathematical functions with no side effects. That said, you want to be able to write Haskell programs that can read input from the keyboard and write output to the screen which are in fact side effects. So, interactive programs have side effects... Interactive programs can be written in Haskell by using types to distinguish pure expressions from impure actions that may involve side effects.
Consider the following:
IO a
The type of actions that return values of type a
IO Char
The type of actions that return a character
IO()
The type of purely side effecting actions that return no result value
Warning: This lecture may contain the use of the term Monad. Do not fear. Everything will be OK.
You should watch these in sequence (or skip around depending on your curent level of knowledge in this domain):
Get the presentation slides here
Chapter 1
Chapter 2
Chapter 3
Chapter 4
Chapter 5
Chapter 6
Chapter 7
Chapter 8[Broken External Image]:http://channel9.msdn.com/504212/WebViewBug.aspx?EVT=0
More...
